network: skip dhcp and dns health checks on internal LB routers - #14106
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nagaboinaramgopal wants to merge 1 commit into
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network: skip dhcp and dns health checks on internal LB routers#14106nagaboinaramgopal wants to merge 1 commit into
nagaboinaramgopal wants to merge 1 commit into
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An internal LB VM runs only the load balancer, but it was given the full virtual router health check set, so the dhcp and dns checks failed on every advanced health check run and flooded the event log. Exclude those checks for a router whose role is internal LB, using the existing per-router excluded-checks mechanism. Fixes: apache#12658
Codecov Report✅ All modified and coverable lines are covered by tests.
Additional details and impacted files@@ Coverage Diff @@
## 4.20 #14106 +/- ##
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- Coverage 16.34% 4.14% -12.21%
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Files 5669 405 -5264
Lines 501405 33073 -468332
Branches 60907 5903 -55004
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- Hits 81975 1370 -80605
+ Misses 410246 31527 -378719
+ Partials 9184 176 -9008
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Description
An internal LB VM runs only the load balancer, but it is configured with the full virtual router health check set. The dhcp and dns checks have nothing to verify on an internal LB, so they fail on every advanced health check run and flood the event log with failures every few minutes.
This excludes the dhcp and dns checks for a router whose role is internal LB, using the existing per-router excluded-checks mechanism (the same one that already excludes the gateway check on backup routers).
Fixes: #12658
Types of changes
Feature/Enhancement Scale or Bug Severity
Feature/Enhancement Scale
Bug Severity
Screenshots (if appropriate):
N/A
How Has This Been Tested?
Added a unit test on createMonitorServiceCommand: for a router whose role is internal LB, the excluded health checks now include dhcp_check.py and dns_check.py. Before this change the excluded set is empty for that router and the test fails. The existing appliance-manager tests still pass.
How did you try to break this feature and the system with this change?
The exclusion is gated on the internal LB role, so a normal virtual router or VPC router is unaffected. The change only appends to the existing excluded-checks list, alongside the backup-router gateway-check exclusion that is already there.